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The launch team picked up the count to today’s launch again at the T-2 hour mark after a planned hold. The next step is to begin loading cryogenic – or super-cold – propellants into the Atlas V first stage and Centaur upper stage. Liquid oxygen with a temperature of minus-297 degrees will be pumped into …

The countdown is on schedule to day to resume at 11:18 a.m. EST after launch teams confirmed they are ready to begin filling the Atlas V booster and Centaur upper stage with cryogenic – super-cold – propellants.

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Omar Baez, the NASA Launch Manager, received a “go” from his launch team to load the cryogenic propellants. The United Launch Alliance will next poll the Atlas V team. Everything remains on schedule to launch at 1:28 p.m. EST.

Good morning from Cape Canaveral Air Force Station in Florida where the weather is warm, the sky is blue with some thin cloud streaks and MAVEN stands atop an Atlas V rocket poised to head to Mars! The launch teams here report everything is on track for a liftoff at 1:28 p.m. EST. If some …

At T-2 hours, the countdown clocks have paused for 30 minutes. Everything remains on schedule for launch at 1:28 p.m. EST. The countdown will resume at 11:18 EST and the launch team will begin the steps to load cryogenic propellants into the Atlas V first stage and Centaur upper stage.

Here’s a look at the Space Launch Complex-41 at Cape Canaveral Air Force Station in Florida this morning where the Atlas V with MAVEN aboard is going through launch preparations. Our continuous coverage here on the NASA Launch Blog and NASA TV’s coverage of the countdown will begin at 11 a.m.

Take a look at the rollout of the Atlas V rocket carrying MAVEN from the Vertical Integration Facility to the launch pad at Space Launch Complex-41 at Cape Canaveral Air Force Station in Florida.

MAVEN’s launch team began today’s countdown on schedule at 6:28 a.m. Managers from NASA and United Launch Alliance are overseeing today’s preparations and launch of the MAVEN spacecraft to Mars atop an Atlas V-401 and Centaur upper stage. Liftoff remains on schedule for 1:28 p.m. EST, the start of a 2-hour launch window. Our continuous countdown …

Diapason Experiment:  Flight Engineer (FE)-5 Mastracchio set up and powered on the Diapason instrument for the final test run. This experiment studies nano-particle migration and capture achieved by very small thermal gradients. The particle size range allows the monitoring of combustion-generated pollution and the identification of atmospheric contaminants on-board ISS. Ocular Health (OH) Measurements: FE-6 …